Is there an analogue of Python's HMAC-SHA1 Signature in Java?

Question

Python

Port the program from python to java (Google Music API). Stuck on signature generation. Python script returns:

import base64
import hmac
from hashlib import sha1

base = "11"
key = "34ee7983-5ee6-4147-aa86-443ea062abf774493d6a-2a15-43fe-aace-e78566927585"
salt = '1386759932759'

mac = hmac.new(key, base, sha1) 
mac.update(salt)
sig = base64.urlsafe_b64encode(mac.digest())
print sig;
#nYVoP7wXhJAMGLlY4mcCwfIilMw=

I rewrote it in Java (I don’t know python to be honest, I googled it):

String sig = "";
        String salt = "1386759932759";
        String base_string = "11";
        String key = "34ee7983-5ee6-4147-aa86-443ea062abf774493d6a-2a15-43fe-aace-e78566927585";
        try {
            Mac mac = Mac.getInstance("HmacSHA1");
            SecretKeySpec secret = new SecretKeySpec(key.getBytes("UTF-8"), mac.getAlgorithm());
            mac.init(secret);
            mac.update(salt.getBytes("UTF-8"));
            byte[] digest = mac.doFinal(base_string.getBytes());
            sig = new String(android.util.Base64.encode(digest, android.util.Base64.URL_SAFE));
        } catch (Exception e) {
            e.printStackTrace();
        }
        AQUtility.debug("computeSignature",sig);
        //Возвращает: H2in0WNfxSCEz3CHNrMVbqfgXt4=

I'm about to explode now. Please help me to do the same. If you do not salt, then it seems to match.